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Introduction Smart phones have introduced great easiness to our daily life by mobile applications. One of the easinesses provided is buying flight tickets via mobile phones. However poor consideration of end-users in development phase leads to underutilization of such facility, thus decreasing potential profit of companies. 2

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Introduction Smart phone use is increasing and mobile commerce is expected to be futures shopping style. In near future, more people are expected to buy flight tickets using their mobile. Challenge arises at that point : Many companies -> many customers. The one pleases the customer would win the competition of mobile commerce (M- Commerce). 4

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Experience and Preference Users experience affects users preference of using that application again. When user perceives a mobile application easy to use, enjoy it to use and efficient in terms of provided services, customers loyalty is gained [2]. Therefore, usability should be analyzed from the point of users. 6

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Objective The objective of the study is to identify usability problems for mobile flight booking applications on touch-screen phones, and suggest solutions. Main expectations of users are presented from HCI perspective and discussed through a case study. 7

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Related Works Some research works have been done on the usability challenges of travel webpage and mobile commercial applications. Psychological background of users perception towards products are investigated. Guidelines for better application usability are suggested for different mobile platforms. However, there is little research about usability challenges faced in touch screen phones, since it is a new technology. 8

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Methodology In order to understand social and personal phenomena in the context, a qualitative approach is adopted in which we conducted interviews with twenty(20) people at two phases and collected answers from questionnaires to increase the accuracy of results. 11

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How was the study conducted? 20 people aged between 18-40 randomly selected. Interviews were conducted: Users were asked to complete the task of buying a flight ticket to any destination of their choice. Their ticket buying processes were closely observed. Notes and questionnaire results were analyzed. Research findings related to flight travel, usability concerns of mobile applications, and user satisfaction criteria were utilized as guidelines. 12

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How was the study conducted? Other market applications that offer mobile flight booking service were also explored for benchmarking. Problem areas were detected and solutions were extracted from previous research findings and benchmarking analysis. Second interview was conducted to obtain users reaction towards the prototype that was built to eliminate problems that had been found in the first interview. 13

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To be Done Things … Functions for disabled people, speech search, speech-to-text facilities, geo-locations services, personalized flight booking assistance have been omitted of this study due to its large complexity that will not fall under single work. In fact, the entire process took considerable time from collecting data to analyzing the data, then designing appropriate graphical interfaces for practical implementation. 47